Extended Life Coolant Additive Maintenance Procedures

The concentration of ELC corrosion inhibitors will gradually deplete, at a much slower rate than SLC corrosion inhibitors, during normal engine operation. Corrosion inhibitor limits are established by the coolant manufacturer. Therefore Detroit™ recommends following the manufacturer’s recommendations as to minimum and maximum limits.

Freeze Point Check

To best measure the quality of anti-freeze coolant, a check of the freeze point (glycol concentration), by refractometer, should be performed at each service interval to ensure anti-freeze levels are within specification. Detroit™ requires a freeze point between -31°C and -42°C (-24°F and -44°F) to guarantee optimal engine protection. The exception would be certain regions that require a freeze point of (-51°C) -60°F to protect against colder climates.

Laboratory Testing

Laboratory testing is the best practice for determining ELC coolant quality and will provide vital information regarding the engine performance. A factory coolant analysis program is available through authorized Detroit™ service outlets. To verify coolant acceptability, submit a sample for coolant analysis according to Table "Extended Life Coolant".

However, a laboratory meeting ISO 17025 requirements may be used in place of the Detroit™ Genuine Parts Program laboratory.

OAT Detection Strips

OAT Detection Strips that monitor the organic acid levels can be used to test the concentration of corrosion inhibitors in the anti-freeze coolant. Detroit™ recommends consultation with your coolant manufacturer's technical representative for proper application.

ELC Enhancers/Extenders

ELC enhancers/extenders can be used to extend the life of the coolant. These products should be added to your anti-freeze coolant when corrosion inhibitors fall below manufacturer's recommendations. Detroit™ recommends consultation with your coolant manufacturer's technical representative for proper application.

Extended Life Coolant Maintenance Intervals

Extended Life Coolant Maintenance Intervals (also known as OAT):
Service Application

Efficient

Long Haul1

Long

Haul2

Short

Haul3

Severe4 Action Required
Engine Series
Series 40, 50, 60 Not Applicable

Every 100,000 miles (160,000 km) or 1 year5

Every 70,000 miles (112,000 km) or 1 year 5

Every 50,000 miles (80,000 km) or 1 year5

Extended Life Coolant Additive Maintenance Procedures
MBE4000, MBE900 Not Applicable

Every 100,000 miles (160,000 km) or 1 year5

Every 70,000 miles (112,000 km) or 1 year 5

Every 50,000 miles (80,000 km) or 1 year5

DD13

130,000 miles (210,000 km) or 1 year5

110,000 miles (178,000 km) or 1 year5

80,000 miles (128,000 km) or 1 year5

70,000 miles (112,000 km) or 1 year5

DD15

150,000 miles (242,000 km) or 1 year5

120,000 miles (194,000 km) or 1 year5

90,000 miles (144,000 km) or 1 year5

70,000 miles (112,000 km) or 1 year5

DD16 Not Applicable

110,000 miles (178,000 km) or 1 year5

80,000 miles (128,000 km) or 1 year5

70,000 miles (112,000 km) or 1 year5

1. Efficient Long Haul (over-the-road transport) service applies to vehicles that annually travel more than 60,000 miles (96,000 kilometers) and average greater than 7 miles per gallon with minimal city stop-and-go operation and minimum idle.
2. Long Haul (over-the-road transport) service applies to vehicles that annually travel more than 60,000 miles (96,000 kilometers) and average greater than 6 miles per gallon with minimal city stop-and-go operation.
3. Short Haul service applies to vehicles that annually travel up to 30,000 to 60,000 miles (48,000 to 96,000 km) and average between 5.1 and 5.9 miles per gallon.
4. Severe service applies to vehicles that annually travel up to 30,000 miles (48,000 km) and average less than 5 miles per gallon or that operate under severe conditions. Severe service also applies to RV applications. Service applies to vehicles that annually travel up to 30,000 miles (48,000 km) or that operate under severe conditions. Only one of these conditions needs be met to categorize an application as Severe Service.
5. Whichever comes first.
    Extended Life Coolant Maintenance Intervals (also known as OAT):
    Service Application

    Efficient

    Long Haul1

    Long

    Haul2

    Short

    Haul3

    		Severe4 Action Required
    Engine Series
    DD5 Not Applicable

    Every 100,000 miles (160,000 km) or 1 year5

    Every 90,000 miles (145,000 km) or 1 year 5

    Every 70,000 miles (113,000 km) or 1 year5

    		Extended Life Coolant Additive Maintenance Procedures
    1. Efficient Long Haul is not applicable to the DD5 engine.
    2. Long Haul service (over-the-road transport) applies to vehicles that annually travel more than 60,000 miles (96,000 km) and average greater than 12.0 miles per gallon with minimal city stop-and-go operation. Examples of Long Haul service are: regional delivery that is mostly freeway mileage, interstate transport, and any road operation with high annual mileage.
    3. Short Haul service applies to vehicles that annually travel up to 60,000 miles (96,000 km) and average between 10.1 and 11.9 miles per gallon and operate under normal conditions. Examples of Short Haul service are: operation primarily in cities and densely populated areas, local transport with infrequent freeway travel, or a high percentage of stop-and-go travel.
    4. Severe service applies to vehicles that average below 10.0 miles per gallon or that operate under severe conditions. Examples of Severe Service are: idle time over 40%, load factor over 55%, operation on extremely poor roads or under heavy dust accumulation; constant exposure to extreme hot, cold, salt-air, or other extreme climates; frequent short-distance travel; construction-site operation; or farm operation. Only one of these conditions needs be met to categorize an application as Severe Service.
    5. Whichever comes first.
      Extended Life Coolant Maintenance Intervals (also known as OAT):
      Service Application

      Efficient

      Long Haul1

      Long

      Haul2

      Short

      Haul3

      		Severe4 Action Required
      Engine Series
      DD8 Not Applicable

      Every 120,000 miles (193,000 km) or 1 year5

      Every 110,000 miles (177,000 km) or 1 year 5

      Every 72,000 miles (145,000 km) or 1 year5

      		Extended Life Coolant Additive Maintenance Procedures
      1. Efficient Long Haul is not applicable to the DD8 engine.
      2. Long Haul service (over-the-road transport) applies to vehicles that annually travel more than 60,000 miles (96,000 km) and average greater than 8.5 miles per gallon with minimal city stop-and-go operation. Examples of Long Haul service are: regional delivery that is mostly freeway mileage, interstate transport, and any road operation with high annual mileage.
      3. Short Haul service applies to vehicles that annually travel up to 60,000 miles (96,000 km) and average between 6.5 and 8.5 miles per gallon and operate under normal conditions. Examples of Short Haul service are: operation primarily in cities and densely populated areas, local transport with infrequent freeway travel, or a high percentage of stop-and-go travel.
      4. Severe service applies to vehicles that average below 10.0 miles per gallon or that operate under severe conditions. Examples of Severe Service are: idle time over 40%, load factor over 55%, operation on extremely poor roads or under heavy dust accumulation; constant exposure to extreme hot, cold, salt-air, or other extreme climates; frequent short-distance travel; construction-site operation; or farm operation. Only one of these conditions needs be met to categorize an application as Severe Service.
      5. Whichever comes first.
        Extended Life Coolant Drain Intervals (also known as OAT):
        Engine Series ELC

        Series 60, 50, 40

        600,000 miles (965,600 km) or 4 years

        MBE4000, MBE900

        DD5, DD8, DD13, DD15, DD16
          Note:
          EA5,EB6
          Parent topic: Coolant Maintenance Intervals
          Document Number:0000008063